RRC ID 69514
Author Kobayashi T, Makino T, Yamashita K, Saito T, Tanaka K, Takahashi T, Kurokawa Y, Yamasaki M, Nakajima K, Morii E, Eguchi H, Doki Y.
Title APR-246 induces apoptosis and enhances chemo-sensitivity via activation of ROS and TAp73-Noxa signal in oesophageal squamous cell cancer with TP53 missense mutation.
Journal Br J Cancer
Abstract BACKGROUND:Mutations in p53, identified in 90% of oesophageal squamous cell carcinoma (ESCC), are associated with unfavourable prognosis and chemo-resistance. APR-246 induces apoptosis by restoring transcriptional ability of mutant p53, and may be a promising therapeutic agent to overcome chemo-resistance in ESCC.
METHODS:In ESCC cell lines differing in p53 status, we performed in vitro cell viability and apoptosis assays, evaluated reactive oxygen species (ROS) generation, and assessed signal changes by western blot after APR-246 administration with/without chemo-agent. Antitumour effects and signal changes were evaluated in in vivo experiments using xenograft and patient-derived xenograft (PDX) mouse models.
RESULTS:APR-246 administration induced significant apoptosis by upregulating p73 and Noxa via ROS induction in ESCC cell lines harbouring p53 missense mutations. Moreover, APR-246 plus chemotherapy exerted combined antitumour effects in ESCC with p53 missense mutations. This effect was also mediated through enhanced ROS activity, leading to massive apoptosis via upregulation of p73 and Noxa. These findings were confirmed by xenograft and PDX models with p53 mutant ESCC.
CONCLUSION:APR-246 strongly induced apoptosis by inducing ROS activity and p73-Noxa signalling, specifically in ESCC with p53 missense mutation. This antitumour effect was further enhanced by combination with 5-FU, which we first confirmed in ESCC preclinical model.
Volume 125(11)
Pages 1523-1532
Published 2021-11-1
DOI 10.1038/s41416-021-01561-0
PII 10.1038/s41416-021-01561-0
PMID 34599296
PMC PMC8608903
MeSH Animals Apoptosis / drug effects Cell Line, Tumor Esophageal Neoplasms / drug therapy* Esophageal Neoplasms / metabolism Esophageal Neoplasms / pathology Esophageal Squamous Cell Carcinoma / drug therapy* Esophageal Squamous Cell Carcinoma / metabolism Esophageal Squamous Cell Carcinoma / pathology Humans Mice Mutation, Missense Proto-Oncogene Proteins c-bcl-2 / metabolism* Quinuclidines / pharmacology* Reactive Oxygen Species / metabolism* Signal Transduction / drug effects Tumor Protein p73 / metabolism* Tumor Suppressor Protein p53 / genetics* Tumor Suppressor Protein p53 / metabolism Up-Regulation / drug effects Xenograft Model Antitumor Assays
IF 5.791
Human and Animal Cells TE-1(RCB1894) TE-4(RCB2097) TE-5(RCB1949) TE-8(RCB2098) TE-9(RCB1988) TE-10(RCB2099) TE-11(RCB2100) TE-14(RCB2101)